Operation Steps for Data Analysis on Double Hypernuclei in E07 Experiment

Abstract

We have developed a new analysis scheme for event identification of double hypernuclei to deal with the largest amount of events which are obtained through the J-PARC E07 experiment. We developed dedicated computer programs which perform range and angle measurement, range-energy translation, measurement of density and shrinkage factor of an emulsion sheet, and kinematic analysis instead of the conventional manual method. The processing time for the production or decay process identification for an event is less than five minutes on a typical PC. Based on this method, we performed the entire analysis process within four days including alpha scanning and processing for range-energy calibration. This method has been applied in the analysis of newly found events including MINO event and IBUKI event by the J-PARC E07.